Atmosphere/libraries/libstratosphere/source/fs/fsa/fs_mount_table.cpp
2021-10-10 00:14:06 -07:00

76 lines
2.2 KiB
C++

/*
* Copyright (c) Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stratosphere.hpp>
#include "fs_mount_table.hpp"
namespace ams::fs::impl {
namespace {
bool MatchesName(const FileSystemAccessor &accessor, const char *name) {
return std::strncmp(accessor.GetName(), name, sizeof(MountName)) == 0;
}
}
bool MountTable::CanAcceptMountName(const char *name) {
for (const auto &fs : m_fs_list) {
if (MatchesName(fs, name)) {
return false;
}
}
return true;
}
Result MountTable::Mount(std::unique_ptr<FileSystemAccessor> &&fs) {
std::scoped_lock lk(m_mutex);
R_UNLESS(this->CanAcceptMountName(fs->GetName()), fs::ResultMountNameAlreadyExists());
m_fs_list.push_back(*fs.release());
return ResultSuccess();
}
Result MountTable::Find(FileSystemAccessor **out, const char *name) {
std::scoped_lock lk(m_mutex);
for (auto &fs : m_fs_list) {
if (MatchesName(fs, name)) {
*out = std::addressof(fs);
return ResultSuccess();
}
}
return fs::ResultNotMounted();
}
void MountTable::Unmount(const char *name) {
std::scoped_lock lk(m_mutex);
for (auto it = m_fs_list.cbegin(); it != m_fs_list.cend(); it++) {
if (MatchesName(*it, name)) {
auto p = std::addressof(*it);
m_fs_list.erase(it);
delete p;
return;
}
}
R_ABORT_UNLESS(fs::ResultNotMounted());
}
}